SPI clock not configurable

Hi ES,

We have analysed your project and noticed that the pin multiplexing for SPI1 pins has not been enabled. Please follow the steps below to configure the GPIO pins for SPI.

1.Open the project in CCES
2.Go to system.svc > Pin Multiplexing tab > Enable the SPI pins as in the attached image.

3.Click Save and Run the project.

After enabling the pin mux, please observe the SPI1 lines and let us know the results.

Regarding SPI clock, the SPI clock frequency is determined by the formula: SCLK / (Clock + 1). In this case, the value 99u passed to the adi_spi_SetClock() API represents the "Clock" parameter, and the SPI clock is derived from the SCLK0.

For example, if the SCLK0 is 100 MHz, the SPI clock would be calculated as 100 MHz / (99 + 1) = 1 MHz.

Regards,
Nandini C

Hi Nandini

Thank you for the reply, but I have another quick doubt to ask, I'm trying to config core cclk and sclk but after configuration when I probe and check in the scope no change is happening by default my sys_clkout is set to 20MHZ, but I want to reduce it so I configured follwing.

#define CLKIN (2000000)
#define CCLK (20000000)
#define SCLK (CCLK/5)

int power_init(int state)
{
if (adi_pwr_Init(0, CLKIN) != ADI_PWR_SUCCESS)
{
perror("Failed to initialize power service \n");
return 0; // failure
};

if (adi_pwr_SetFreq(0, CCLK, SCLK) != 0)
{
perror("Failed to config Core or Sysclk failed");
return 0;
}
return 1;
}

is ther anything cfg is wrong?

regards,
ES

Hi Nandini,

Thank you for your support, I have found where I have made the mistake now its fine, you can close this thread.

Regards,
ES